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IMPROVEMENT IN BAG ENGINES FOR PAPER MAKING.

JAMES SHEW, OF PAPER MILLS MARYLANII Letters Patent No. 60,645, datedDecember 18, 1866.

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have invented a new and useful Improvement in Rag Engines for PaperMaking the following is a full, clear,

and State of Maryland,

and exactdescription thereof, which will enable others skilled in theart to make andJnse the -same,referenco being had to the accompanyingdrawings, forming a part of this specification,

in which Figure lisa vertical longitudinal section of a rag engine,taken in the line a: z, fig. 2. v Figure 2Iis a plan of the same.

Similar letters of reference indicate like parts. This invention relatesto an improvement-on rag engines for the manufacture of paper, andconsists in attaching to each end of the cutting cylinder a-volutedflange or spiral scroll, for the purp'ose of preventing the rags fromworking in around. the spindle and choking" the cylinder, thusmaterially increasing friction and Wasting power, as is the case withthe ordinary rag engine My improvement saves this loss of power and asit prevents the-passage of any of the rags through the engine exceptbetween the cutters, they are all equally comminuted and reduced to aperfectly evenpaper pulp. Except inmy, improvement, the rag "engine isin all .respects the same as those inordinary use.

A represents the cistern or pulp vat}, B, thecutting cylinder, hung onthe spindle, C 'above the rising incline, a a, and the falling incline(1'4"; 6 b are the cutters on the cylinder, and c c the block plates orstationary cutters underneath the cylinder; D is the cap or box cover ofthe cylinder. On each end of the cutting cylinder, B, is placedaspiralscroll orvoluted flange e e, the pole of which volute is thespindle C, to which it is united, terminating in its convolution at theperiphery of I the cylinder. .The flange projects. equally at both endsof the cutting cylinder, soas'jnst to fill'and clear the sides of thecompartment in which it revolves, and

p to the-line of rotary movement of the cylinder, indicated by thearrow,

. is obviouslyto'constantly throwofi the pulp from the ce'ntre'tortheciro the coil of the flange is in.the same direction on both ends, thescroll or volute expanding orunrolling contrary fig. 1, the eiiect-ofwhich arrangement I u'mference,.and prevent any accumula tion of rags atthe endsand around the spindle, D, when-the cutting cylinder revolves. iI

Having thus described my invention, .what I claim as new, and desiretosecure by Letters Patent, is-

Placing a spiral scroll or voluted' flange on the ends of the cuttingcylinder of a rag engine of a paper mill, substantially as andfor thepurposes herein described.

JAMES. M. SHEW.

- Witnesses:

Wu. H. Hormsn, Hnnsr Donn.

and I do hereby declare that

